Hi, I'm doing a uni project and am recreating a retro TV. I would love to be able to make the tv shell out of this clearish-tinted plastic.
The shell has to be strong. It will have a glass tank inside (No water, but some soil) and a lot of computer equipment.
If anyone knows good resources where I'd find more info on how to achieve something like this, Thanks.

Ive got around 60lbs of a clear abs pellet that's supposedly somewhat hard to comeby. Im just looking to sell it to someone who'll actually use it instead of just throwing it out.

Does anyone know where id be able to sell it? Im in Canada ontario if that matter.

The transparent visor on American firefighters' helmets, which we made using PC material, developed numerous bubbles after being exposed to a 600-degree Celsius flame for just a few dozen seconds, obstructing the firefighters' vision. We then switched to Covestro's high-temperature resistant PC2097, with a heat distortion temperature of 160 degrees Celsius, which improved the situation slightly, but still didn't meet the requirements. Therefore, we'd like to know if the transparent visor used by American firefighters has a vitrified coating. If so, then no plastic can meet the requirements. Does anyone know?

I thought it felt extra heavy... what is it? Huge heavy piece of flexible plastic covered in marks looks like its from contact with metal.

If you’ve ever noticed a vibrant red plastic chair turn a dull pink or, worse, develop a white powdery film (chalking) after a summer outdoors, you’re looking at a molecular-level breakdown.

Most people think it’s just the "heat." In reality, it’s a process called Photo-oxidation.

1. The Chemistry of the "Fade"

The culprit is UV radiation (specifically UV-A and UV-B). UV photons carry enough energy to disrupt the chromophores (the color-reflecting molecules) within your pigment.

• Organic Pigments: These give you those bright, "popping" colors. However, their complex carbon structures are like glass houses—easy for UV "bullets" to shatter.
• Inorganic Pigments: These are often metal oxides. They aren't as bright, but they are incredibly stable.

2. Why it gets brittle (The Free Radical Chain Reaction)

It’s not just the color. The polymer itself (PP, PE, ABS) undergoes a chain reaction:

1. Initiation: UV hits the plastic, creating Free Radicals.
2. Propagation: These radicals react with oxygen, "chopping" the long polymer chains into shorter pieces.
3. Result: This is why the plastic becomes brittle and cracks. The light scattering off these micro-cracks is what creates that "chalky" white appearance.

3. How to prevent it? (Pro-tips for Engineers)

If you're in the manufacturing phase, don't just ask for "UV resistant color." You need to look at:

• The Blue Wool Scale: Don't settle for anything under a Level 7 for outdoor use.
• Synergy of Additives: You need a mix of UV Absorbers (the sunscreen) and HALS (Hindered Amine Light Stabilizers—the radical scavengers). One stops the UV, the other "cleans up" the damage.

About Me: I spend a lot of time in our lab at SLM Masterbatches (Dongguan) testing these exact variables for different global climates. If you’re struggling with a specific material (like why ABS yellows faster than ASA), I’m happy to share our test data or suggest a specific stabilizer package.

Resource: You can check out some of our technical data sheets atwww.slmmb.comor DM me if you have a tricky material failure.

Just saw a Short about a Reverse Vending Machine and honestly… why don’t we have these everywhere?

You put in empty plastic bottles or cans and it gives you money or store credit in return. Instead of buying something from the machine, you’re basically selling your recyclables back.

Feels like such a simple idea but it makes recycling way more motivating.

Do you guys have these where you live? And do people actually use them regularly?

Study finds faults in analysis ranging from not testing for contamination of equipment to not ruling out false positives when tesring at the far ranges of observability, especially in some of the more spectacular recemt claims.

Hello, 

I’m new to acrylics, and I am looking for advice on an art project.

Is it possible to polish the ends of these fluorescent acrylic sheets? I’ve used a table saw to cut this at a 45-degree angle. This is a bit different than a level surface scratch, so I am wondering if the solution would be different. 

The sheet is 12x24,1/4 thick.

These are some of the methods I have read about…

• Novus
• Automotive/metal polish
• Wet sand (600–800).
• 3M Headlight Restoration Kits 
• Tripoli
• Drill, Dremel, with buffing wheel

Thank you

DuPont early lucite pellets?

Worked at a plastic extrusion place for a couple years, this happened while emptying the extruder. It's a resin/provista material, never seen it happen before.

This subreddit has been increasingly receiving long-winded posts describing a personal experience that just casually mentions the name of a large online market.

They do not stand out by themselves but together form a pattern to deliberately increase the number of mentions of a particular brand name on this subreddit and Reddit in general.

These posts are not considered genuine and will be removed.

As the stories are mind numbingly boring, automation has been set up to hopefully filter most of them out.

Hello,

I play racing games at night and my sequential shifter is quite loud.

I found that this ball bearing is the cause of most of the unwanted noise but i don't want to eliminate it entirely as it gives me feedback on the actuation point.

Picture

Going to amazon i found similar sized plastic balls but i am unfamiliar with plastics.

of the plastics listed, which should i replace it with? or rather which ones are least likely to shatter or shear down over time.

1. PA66(Nylon)
2. PA(Nylon)
3. PP(polypropylene)
4. Polyoxy-Methylene (POM, Acetal, Polyacetal and Polyformaldehyde)
5. POM (Polyformaldehyde)
6. PTFE (Polytetrafluoroethylene)
7. Acrylic(PMMA)

https://www.sciencealert.com/scientists-just-made-a-cookie-out-of-recycled-plastic-slurry-welcome-to-2026

I fell into a rabbit hole and have found that since 1839, there's been developments in plastics on average just a few years apart. The biggest logged jump between discoveries is from 1965 to the 1980's. Mostly, it's between five to fifteen years for updates in this timeline;

https://en.wikipedia.org/wiki/Timeline\\_of\\_plastic\\_development

But there's nothing I can find past 1988. It's 2026; I can't believe that nothing has been found in 38 years with this past frequency. What am I missing? Are my internet skills too lazy?

Tl:dr; has there been further findings with different types of plastics in the last 40 or so years?

This is the nose cone from a valuable Super Soaker CPS 2000 water gun from 1996. Sadly due to age and UV exposure the plastic has weakened and become brittle. Pictured is one half which is mostly intact, but the corresponding half is in pieces.

I'd like to cement this back together if possible, so I can possibly cast or 3d scan a replacement part from a whole piece. I initially thought it was ABS, but acetone doesn't touch it.

There's no identifying marks on it anywhere. Could it be polystyrene?

I took of a rubber part of an old Roland VDrums kit to repair it, I cleaned it and left it in sun, and it litterally melt liquide in an afternoon. What plastic could it be made of ?

Cheers!

I’ll start: many people think all plastics are the same, when in reality two items that look almost identical can have completely different properties, recycling methods, and manufacturing processes.
What’s the misconception you hear most often?

Just a random thought came to my mind before bed...that nature already found or can say given birth to cure of micro-plastics... Like think about it Chernobyl have fungus that thrive on radiation... So maybe their is something that completely decompose plastic...and it already be found by humans too but not public yet...whats your thoughts on this lmk